Improvement in let-offs for looms



top view of the same.

i UNITED STATES PATENT V OFFICE.

WM. W. POMEROY, OF EAST HAMPTON, MASSACHUSETTS, ASSIGNOR TO HIMSELF ANDJ. WILSON, OF SAME PLACE.

IMPROVEMENTIN LET-O-FFS FOR Looms.

Specification forming part of Letters Patent No. 49,479, dated August15, 1865.

To all whom it. may concern:

Be it known that I, WILLIAM W. POMEROY, of East Hampton, in the countyof Hampshire and State of Massachusetts, have invented a new andImproved Let-Olf Motion for Looms; and I do hereby declare that thefollowing is a full, clear, and exact description thereof, which willenable others skilled in the art to make and use the same, referencebeing had to the accompanying drawings, forming part of thisspecification, in which s Figure 1 represents a longitudinal vertical.section of this invention. Fig. 2 is a plan or Similar letters ofreference indicate like parts.

This invention consists in the combination, with the mechanism.ereinafterndescr h dl which holds the yarn-beam and prevents it fromturning spontaneously, of a weight suspended from a sheave which restsin a bight of the warp in such a manner that by the ac tion of saidweight against the mechanism which holds the yarn-beam the warp is setat liberty whenever the loom requires it, and at the same time by theweight all the slack in the warp is taken up and allowed to pass to theloom as required.

' The friction apparatus consists of a concave conical socket or seat inthe end of the warpbeam, in combination with a. conical plug sliding onthe axle of said warp-beam and connected to the lever, which is actedupon by the weight, as above stated, in such a manner that when saidlever is left to follow its own inherent gravity, assisted by the actionof spiral springs, the conical plug is pressed into the conical seatwith suflicient forceto hold the warp'beam stationary; but as soon asthe lever is raised the warp-beam is released and a portion of the warpis let ofi'.

A represents the top castle or upper part of a loom, the working partsof which have their hearings in a frame, B, constructed of wood or anyother suitable material in the usual manner.

0 represents theflwarp-beam, or oneof a se ries of spools from which'thewarp is taken.

The axle a of this warp-beam is secured to a plate, b, of cast-iron orother suitable material, which is rigidlyattached to theframeB. Saidaxle is stationary, the warp-beam being arranged to turn on it freely.The end of the warp-beam is provided with a conical socket or seat, 0,which is intended to receivea corresponding-conical plug, d, that slidesback and forth on the axle a of the warp-beam. Said plug is guided by apair of pins, 0, which pass through the plate or bracket b, and spiralsprings f, placed between said bracket andthe plug, have a tendency toforce the latter into the conical socket or seat of the Warp-beam.

From the inner'end of thebracket b extends an elbow-lever, g h, whichhasits fulcrum on a pin, 2', secured in lugs j, that are rigidlyattached topr cast solidwith the bracket. .l'.he short arm g of thiselbow-lever is pivoted to a cross-head, k, which connects the guide-pinse, and the long arm h extends in a horizontal direction under the topcastle of the loom,and it is provided with a slot through which the warp1 passes up and down, as shown. As the warp leaves the warp-beam it isdrawn over two pulleys, 1m, in the top castle, and from the lastna-medpulley m it passes down through the slot in the lever h, thence up overthe pulley 'n, and down to the loom. In the bightforrned by the warppassing down and up through the slotted lever hangs a pulley-block, o,from which a weight, 10, is suspended, as clearly shown in Fig. 1 of thedrawings. Thisweight may be composed of a series of-slip-weights, so

that the strain on the warp can be increased or decreased at pleasure.As the warpis taken up by the loom the weight 12 rises gradually untilthe pulley-blockost-rikes the lever h, and

by forcing the same up the conical block is withdrawn from the socket inthe end of the warp-beam, and said warp-beam is free to revolve. Aquantity of warp being thus let ofi the weight descends and the lever'gIt returns to its original position,forcing the conical plug back in itssocket or seat and holding the warpbeam stationary. All the slack in thewarp is taken up by the weight, and if the work has to be let back forsome cause, it is not necessary to turn the yam-beam back in order toturn up the warp-beam, in combination with the slid ring friction-plng.,elbow-lever, and weight suspended from the bight in the warp,substantially in the manner and for the purpose set forth.

WM. W. POMEROY.

Witnesses:

E. R. Boswom'rr, JOHN MAYHER.-

